Packing Clarissa's Genes
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Matt looked up at his sister, who had released his wrists, but was
still sitting on his boner. She had a really funny look on her face
too. She was flushed, and she was breathing much more deeply than her
recent physical expense of energy could account for.
"Are you going to let me up?" he asked.
"I don't know," she said dreamily. Her hands came up and Matt watched
in amazement as she rubbed her breasts.
"Rissa? What are you doing?"
Her eyes cleared suddenly and she looked at her hands like they were
those of another person. They jerked down from her chest.
"I don't know!" she said, her voice shaky.
"Are you OK?"
"I feel so funny," she moaned. "Matt, something's wrong with meeee!"
He tried to sit up, which basically required that she scoot back onto
his thighs. As she did so the crotch of her jeans scraped along his
erection and she gasped. She stopped and it was literally impossible
for her to stop herself from grinding her pussy against Matt's boner.
"Ohhhhh," she groaned, practically writhing on him. "What's wrong with
me?" Her breathing increased to a quick pant.
As Clarissa had experienced an epiphany earlier, about what Matt had
been doing with the Playboy magazine, Matt had his own epiphany as he
felt his sister rubbing her crotch all over his erection.
"You're horny!" he gasped.
"Is THAT what this is?" she panted.
"You're fucking horny!"
"Don't curse!" she snapped automatically. Then her voice took on a
whining note. "Help me, Matty! I feel like I'm going to explode! What's
happening to me?"
Matt's astonishment was based primarily in the fact that he had never
really thought of his sister as a "girl" before. She was many things to
him. Besides being his sister she was, at one time or another, a
friend, pain in the ass, tutor, partner in mischief and quite possibly
played a dozen other roles in his life as well. But she had never
played the role of sexy turned on girl who was grinding her pussy
against his hard dick. He knew what HE needed right now, and
he was pretty sure what SHE needed too.
"You need to cum," he said, beginning to pant in time with her gasps.
"What?" Her eyes were taking on a wild appearance.
"You need to cum...you know...get off...like I do sometimes."
"Masturbate?!" Her voice made it sound like she was trying out some
word in a foreign language for the first time.
"Yes," groaned Matt as her hips thrust rapidly back and forth.
Clarissa's body seemed to know what to do, even if her brain didn't.
"I don't do that," she moaned.
"Well you'd better start ... if you want that feeling to go away," said
Matt. "And get off me, 'cause you're making me want to do it too."
"Oh shit, oh shit, oh shit, oh shit," chanted Clarissa in time with her
"Now look who's cussing," huffed Matt, who was in the process of
realizing that if his sister kept doing what she was doing, he might
very well be able to shoot off right in his pants. He wanted
to cum ... but not in his pants.
"I don't know how!" she whined, referring to the activity he had just
suggested she engage in.
Matt watched her breasts jiggle and shake under her shirt as she moved
on top of him. He was pretty sure he wasn't supposed to be
this turned on by his own sister, but the fact was he WAS turned on,
and it was getting better...or worse...every second.
"I'll show you!" he gasped, sitting up and pushing her.
Clarissa lost her balance and fell over onto the floor, moaning. Her
thighs began rubbing together as if they itched and she had no fingers
to scratch them with. Matt didn't wait for her to approve his actions.
He simply stood up, undid his pants and shoved both them and his
underwear to his ankles. His T shirt hung down too low, so he just
whipped it up and off his head. Clarissa stared, transfixed,
at his rock hard penis, which bobbed up and down as he moved.
The "You can't do that!" that burst from her lips was purely from her
subconscious, and just popped out.
"Like this!" said Matt, who gripped his penis and started jerking on it
"MATT!" squealed Clarissa, whose eyes couldn't leave the fascinating
sight in front of her. It looked like he was tearing the skin off his
penis. As his hand moved back the skin went with it and a shiny knob
suddenly appeared that she hadn't seen before. Then, when his hand
moved forward, the skin came back with it and covered the knob. It was
happening so fast that it seemed like one of those old time movies
where the screen displayed a strobe-like effect.
She was distracted by her own body screaming at her again. Her hand
went to press against the crotch of her jeans and she was startled to
find she had peed her pants or something, because it was wet down
there. Still, it felt SO good to press.
"Just rub!" gasped Matt, watching her hand. This was the most exciting
thing that had ever happened to him and he was loving every second of
Clarissa remembered how it had felt to rub against Matt, and her hips
jerked against her hand. Then the meaning of his words sank in and she
moved her fingers. It felt wonderful, but not like it had to rub
against him. The scholastic part of her high IQ brain was still
functioning enough to give her the information that she couldn't press
her hand against herself with as much force as her body weight had used
to rub against him.
Her eyes had never left his penis and that same part of her brain
pointed out that he was having skin-to-skin contact. Almost frantically
she fumbled with her belt, and then the button and zipper of the jeans.
She shoved her hand inside her pants. Her fingertips just barely got to
the top of her split...enough to tell her that THIS was the right way.
But she moaned as she realized the jeans were too tight. She couldn't
get her fingers lower, to where she instinctively knew she needed to
She was lying on her side, so she simply rolled onto her back, arching
her hips as her hands pushed at the stubborn pants until they finally
slid over her hips to her thighs. They took her panties about half that
distance, but that was good enough because now she could reach what she
wanted to reach.
"Oh dude!" gasped Matt, who had watched her pants come down and gotten
his very first shot of real pussy. He didn't even care that her hand
covered it up almost immediately, because he was WATCHING a girl rub
off! It felt so good to stroke his dick right then that he hoped he
WOULDN'T cum. To that end he stopped stroking for a few seconds, just
squeezing, instead. He didn't pay any attention to the pearly drop of
precum that oozed from the tip of his cock.
Clarissa did, though. She saw the drip of his precum and the academic
part of her brain registered its source and meaning. Her mind felt like
it was going in five different directions at once. Now that she could
get her fingers into her sex she felt the slippery, hot swamp that had
never been there before. The feeling was almost overwhelming, as her
inexperienced fingers found her clitty, which happily told her to rub
RIGHT THERE! At the same time she was watching Matt, and that beautiful
thing she'd seen a hundred times, but which had NEVER looked like THIS!
She felt the urge to spread her legs, but couldn't, because her jeans
were keeping them closed. Still, that fascinating, terrifying pressure
was back, and it kept getting stronger and stronger. She was sure that
she'd just die if something didn't happen soon to end it but, like her
brother, everything felt so wonderful that she didn't want it to stop.
All these things were rampaging around in her mind as her body finally
reacted to the stimuli she was experiencing. She gave a
convulsive jerk and Clarissa experienced her very first orgasm. She
didn't know that's what it was. She knew the word, but that's all it
was...just a word she'd learned somewhere...that had no basis in
But her body didn't care what she knew. It just reacted the way nature,
and a healthy overdose of RD684 intended it to.
Her scream of completion scared Matt at first, until HIS Mensa eligible
brain recognized her jerks and twists as the female version of what he
was about to do any second. She was cumming, and it was so hot to see
it that that's all it took to bring him off.
Clarissa missed the main event, so to speak. That's because her eyes
were tightly closed. She saw stars that weren't really there,
instead of the jets of semen that rocketed out of her brother's penis.
Her consciousness was suspended in an expanding ball of pure pleasure
as that semen landed in long strips that crossed both of her thighs,
her panties, her hand and the exposed skin where her shirt had ridden
up. Matt didn't aim it. It just happened that some of his sperm landed
right on top of the thin layer of skin that separated it from what it
was programmed to seek - the eggs in her ovaries under that skin.
Matt's own orgasm was so powerful that he sank to his knees, gasping
for breath. He felt so weak that his head fell forward and his chin
touched his bony chest. His shoulders sagged. He couldn't even hold on
to his prick any longer. It took everything he had to avoid simply
falling over on the floor.
Bob punched buttons on the phone. It rang and rang on the other end,
which seemed odd. One of the kids usually picked up by the third ring.
There was a rattle and a panting voice yelled "HELLO!"
"Uncle Bob!" came Matt's gasping voice.
"What's wrong?" asked Bob, concerned.
"NOTHING!" yelled Matt. His voice came down. "I had to run to get to
"Son, if you're breathing that hard just from running to the phone, you
need more exercise."
"Right," said Matt, his breathing a little less labored.
"Anyway," said Bob. "I'm stuck at work. You guys are on your own for a
"OK," said Matt. "No problem."
"Save me some supper," said Bob, eager to get back to work so he could
feel like the world wasn't caving in on him.
"Got it!" said Matt. "Bye!"
Matt went back to the living room. He'd fastened his pants while he
talked to his uncle. He found his sister also reassembled and looking a
little dazed. She was sitting on the couch now, instead of
lying on the floor. His shirt was lying on the floor. He
picked it up and put it on as he spoke.
"That was Uncle Bob," he said. "He has to work late."
"That's a good thing," said Clarissa softly. "What if he'd come home
while we were doing...that?" It was a rhetorical question, but her
brother answered it anyway. He shrugged his shoulders.
"I don't know. Do you think he'd have gotten all pissed off?"
She looked at him sharply. "Of course, you idiot. We were
masturbating!" The irritation on her face faded. "I was masturbating!"
she exclaimed softly. "I can't believe I was masturbating."
"Why not?" asked Matt. He might be socially challenged, but he was
still a normal male of the species. "Everybody does it."
"I don't," she said. "I mean I didn't." Her analytical mind was
beginning to deal with the recent events. "I wonder why I never did. I
mean I know what you're saying. Everybody SAYS that everybody else does
it. Maybe I'm going insane."
Matt snorted. "It doesn't make you insane." He was still filled with
the after effects of the best cum of his life, and babbled a bit. "It
also doesn't make you go blind or make hair grow on your palms. I
checked...lots of times, at first." Unthinking, he lifted a hand and
looked at his right palm. When he didn't see hair on it he dropped it.
"I THOUGHT I was going crazy," she said with a little shiver. She felt
a heavy lassitude throughout her body, as if she'd just run a very long
distance and was recovering from that.
"It's pretty cool, huh?" Matt smiled. "There's just about nothing else
that feels that good."
Something in Clarissa's mind agreed with his comment, but something
else suggested she should feel guilty.
"I masturbated," she said again. She looked up at her brother. "WE
masturbated, Matty! TOGETHER!"
"Yeah," he sighed happily. "It was even better than usual."
"But you're my brother!" she complained.
"So?" He looked a little impatient. "You think it would have been
better to do it with somebody else?"
"Of course not," she said automatically. "But it isn't right to do it
at all! I mean together...you and me."
"I don't see why not," said Matt. "Uncle Bob said that it's normal. He
said that hundreds of years ago a boy my age might have already been
married, or at least thinking about getting married. He'd have a wife
to have sex with and it wouldn't get all bottled up inside."
"Was that what happened to me?" asked Clarissa. "Did it get all bottled
up inside? Why? It's never happened before."
"I don't know," said Matt. "I just know it's fun, and it doesn't hurt
anything and I like to do it sometimes." His eyes fell to the gap in
her shirt. "You want to do it again?"
"What?!" She looked shocked.
"I could do it again right now," he said, shrugging his shoulders.
"Watching you do it was so hot. Doing it with you was lots better than
doing it alone."
"See?!" she moaned. "It DOES make you insane!"
"I'm not insane," he said firmly. His stomach growled and they both
heard it. "What I am is hungry. I need something to eat."
That was something else to think about...something normal...and
Clarissa seized on that to get her life back to something closer to
normal. She jumped up.
"THAT I'll do with you," she said.
They scurried to the kitchen. Both were on the rotating schedule to
prepare supper, so both had plenty of experience at cooking. While it
was technically Matt's turn this week, Clarissa pitched in to help him.
"You get the vegetable and I'll do the meat," she offered.
"Deal," said her brother. He watched as she detoured to the snack
cabinet and got out a piece of candy.
"What's that?" he asked.
"Candy," she said.
"When did we get candy?" he asked.
"I don't know," she said. "Uncle Bob must have gotten them."
"Well I'm hungry too!" he complained.
"Don't expect me to peel one and feed it to you," said Clarissa,
feeling much more normal as they verbally sparred. She was used to this
kind of relationship.
Matt looked through the boxes, like she had. "Different flavors?" he
"Not as far as I can tell," she said.
He ate a blue one and then a green one.
"Not bad," he said. He grabbed a handful.
"Hey!" she said. "Don't hog them."
"I thought you were going to get the meat ready," he said, popping two
more in his mouth.
They sat, eating, and Clarissa watched Matt. She still couldn't believe
what had happened. It seemed like some strange dream. But she knew it
HAD happened. She couldn't help but look at Matt differently now. She
remembered the scrunched look on his face while his hand flew back and
forth on his penis. She felt tingles in her body as she remembered what
his penis looked like, so long and stiff like it had been.
"Could you really do that again right now?" she asked suddenly.
Matt had been thinking about the event too. He couldn't keep his eyes
off that little gap in her shirt that he could see skin through.
"Sure," he said. "I can do it four or five times a day."
"You're kidding!" she sighed. She wondered what it would be like to
feel that good four or five times a day. She felt a tremor in her belly
at the thought, and her nipples reminded her they were right there,
under the shirt, available for squeezing.
"Nope," he said. He had no idea why all this had happened, but he
thought it was great. He hoped it would go on.
"You act like it's so normal!" said his sister.
"It is," he said. "I've been doing it for over a year now."
"And Uncle Bob said you could." She found that so hard to believe.
"He said I probably SHOULD," Matt corrected her. "He said it can
uncomplicate things...relieve stress. And he's right, don't you think?
Didn't you like it?"
Clarissa didn't know what to say. She HAD liked it, but for some
reasons she couldn't quite identify she didn't think she was supposed
to admit that to Matt. Then she remembered how they had been
practically naked together, not to mention what they had done, and it
seemed silly to be embarrassed.
"Yeah, I guess it was OK," she said, trying not to sound too
"I thought you were going to pass out," he said grinning. "It was so
hot that I spooged."
"Was that what was all over me?" she asked with a little shudder.
"Yeah...sorry," he said. He actually looked sorry. "I kind of couldn't
help it. I usually have a tissue or something to catch it in."
"I found it on me and it was...weird ... all slippery and warm," she
said. "I didn't know where it came from. I mean I knew it had to have
come from you, but ..." She sighed. "This all so new."
"It was the best," said Matt. "I mean the best I ever felt," he added.
"Yes!" he said. "Looking at you...I don't know...it was just so cool!"
"And you don't think we're perverts or something?"
He looked thoughtful for half a minute.
"I don't really think so," he said. "I mean if it was some other girl,
who I didn't know or something...I don't think I could have actually
done it. Isn't that strange? But I know you. I love you. It was like we
were swimming. Remember how we used to play tag in the pool when we
were little? I loved that. I loved it that neither of us had a top on."
"But I didn't have any boobs then," said Clarissa.
"I know. I still loved it. It made me feel really close to you or
something. I never played with any other kids like that."
"I remember it as being fun, but I didn't pay any attention to your
body," she said.
"Maybe boys are different than girls," he suggested.
"Well duh!" She laughed. It felt good to laugh, almost like everything
was normal again.
"You're sure different now," he sighed. He was staring right at her
"It makes me feel funny when you look at me like that." Clarissa felt
the pangs of longing begin to course through her body.
"Sorry." His eyes didn't leave her breasts, though.
"No, I mean funny good. I think I'm getting horny again!"
"Really? I'm...I don't know...still horny, I guess." Matt's eyes seemed
glued to her breasts.
"Why are you staring at them?" Clarissa asked. She wasn't used to boys
staring at her chest.
"I can see your nipples," he sighed. "It's hot."
"You can't see them. I have a shirt on!"
"I mean through the shirt," he said. "If I could actually see them I'd
probably pass out."
"You would not!"
"I guess you're right," he said. "I'd have said the same thing about
your pussy, but I saw that and didn't pass out. It made me cum, though."
"I never came before," sighed Clarissa. "That was so awesome," she
added, forgetting that she was trying not to be too enthusiastic about
it. "I'm getting really horny thinking about it, Matt. What's wrong
with me? I never got like this before."
"I don't know," he said. "Except that horny is easy to deal with. You
just rub off again. Like I said, sometimes I do it four or five times a
day. You want to do it again now? Together I mean? That was the best
part, Rissa. You're so beautiful now. I've got another boner just from
looking at you."
She looked at him through lowered lashes. Her face was flushed, but not
"How late did Uncle Bob say he'd be?"
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